diff options
| author | Sven Schnelle <svens@linux.ibm.com> | 2025-01-08 15:27:04 +0100 |
|---|---|---|
| committer | Alexander Gordeev <agordeev@linux.ibm.com> | 2025-01-13 09:50:18 +0100 |
| commit | 94446b4dcbbee79ff18173435950b2d1a7513c1b (patch) | |
| tree | f96080a62aee8758e56a7ca7d8c3d04537e8eb58 | |
| parent | 90c5515dcb9c824db244f42a98c765bd0542f109 (diff) | |
s390/ebcdic: Use exrl instead of ex
exrl is present in all machines currently supported, therefore prefer
it over ex. This saves one instruction and doesn't need an additional
register to hold the address of the target instruction.
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
| -rw-r--r-- | arch/s390/include/asm/ebcdic.h | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/arch/s390/include/asm/ebcdic.h b/arch/s390/include/asm/ebcdic.h index efb50fc6866c..cfa340552328 100644 --- a/arch/s390/include/asm/ebcdic.h +++ b/arch/s390/include/asm/ebcdic.h @@ -25,15 +25,15 @@ codepage_convert(const __u8 *codepage, volatile char *addr, unsigned long nr) if (nr-- <= 0) return; asm volatile( - " bras 1,1f\n" - " tr 0(1,%0),0(%2)\n" - "0: tr 0(256,%0),0(%2)\n" + " j 2f\n" + "0: tr 0(1,%0),0(%2)\n" + "1: tr 0(256,%0),0(%2)\n" " la %0,256(%0)\n" - "1: ahi %1,-256\n" - " jnm 0b\n" - " ex %1,0(1)" + "2: ahi %1,-256\n" + " jnm 1b\n" + " exrl %1,0b" : "+&a" (addr), "+&a" (nr) - : "a" (codepage) : "cc", "memory", "1"); + : "a" (codepage) : "cc", "memory"); } #define ASCEBC(addr,nr) codepage_convert(_ascebc, addr, nr) |